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How To Determine Temperature Correction Factors For Resistance: Copper Conductors

The DC resistance of copper wire increases with increasing temperature in accordance with the formula:

On the basis of the above formula, we now generate a table of correction factors for copper conductors in operating in the temperature range 25 – 200 degree celsius:


Temperature (0C)
Multiplying Factor
25
1.000
40
1.058
50
1.096
55
1.116
60
1.135
65
1.154
70
1.173
75
1.193
80
1.212
85
1.231
90
1.250
100
1.289
105
1.308
125
1.385
130
1.404
150
1.482
200
1.674

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